Equine focal mucopurulent placentitis associated with Stenotrophomonas maltophilia. (20th June 2020)

• Record Type: Journal Article
• Authors: Gomes, V. C. L.; Del Piero, F.; Langohr, I. M.; de Aguiar, L. H.; Anderson, A.; Sones, J. L.; Pinto, C. R.
• Is Part Of: Equine veterinary education. Volume 33:Number 9(2021)
• Page Start: e292
• Page End: e297
• Publication Date: 2020-06-20
• Subjects: horse -- abortion -- premature delivery -- nocardioform -- allantochorionitis; Horses -- Diseases -- Periodicals; Horses -- Diseases -- Treatment -- Periodicals; 636.108905
• DOI: 10.1111/eve.13310
• Languages: English
• ISSNs: 0957-7734

Abstract

Summary: Two cases of focal mucopurulent placentitis (FMP) associated with Stenotrophomonas maltophilia are reported herein. The first patient, a 12‐year‐old Quarter Horse mare, aborted at 287 days of gestation and the fetus and placenta were submitted for post‐mortem examination. Histopathological findings included chronic exudative allantochorionitis and fetal multifocal suppurative hepatitis. The second patient, a 10‐year‐old Thoroughbred mare, prematurely delivered a live foal at 293 days of gestation. Chronic exudative allantochorionitis and perifunisitis were diagnosed. The foal was severely compromised and was euthanised. On post‐mortem examination, pneumonia, myocardial and hepatic necrosis, and sepsis were diagnosed. The fetal membranes of both mares had a thick adherent mass of exudate overlaying the chorionic surface. The lesions were well demarcated, and the underlining chorion was avillous, pale and thickened. Stenotrophomonas maltophilia was isolated from the exudate of both mares and from the lungs and stomach of the fetus from the first patient. To the authors' knowledge, this is the first clinical description of FMP associated with S. maltophilia in the USA. The aetiopathogenesis of placentitis induced by this micro‐organism and its relevance as an emerging pathogen in equine reproduction remains to be further elucidated.